A gasket assembly is provided having a ring seal (100) and a ring joint gasket (12). The ring seal (100) has an annular sealing body (102) and an annular outer seal portion (106) disposed on and defining an outer edge of the annular sealing body (102). An annular inner seal portion (108) is disposed on and defines an inner edge of the annular sealing body (102). A central bore (104) is defined by an annular surface (110) of the annular inner seal portion (108). The ring joint gasket (12) has an inner surface (13) that engages the annular outer seal portion (106) of the ring seal (100), wherein the ring joint gasket is insertable into a flange of a ring-type joint.

A film-integrated gasket is provided in which a gasket body is supported by a gasket support body formed of a resin film and a film thickness t.sub.2 at a position where the gasket body is supported is set to be smaller than a film thickness t.sub.1 at an adjacent position thereto so as to satisfy a demand for low reaction force by reducing the compression ratio in the thickness directional in mounting. The film-integrated gasket can be provided with a portion compressed in the thickness direction at the position where the gasket body is supported, so that the portion sets a thickness difference. The film-integrated gasket can alternatively be provided with a portion where a plurality of resin films is stacked at an adjacent position to the position where the gasket main body is supported, so that the portion sets a thickness difference.

A method for manufacturing a pipe conduit arrangement including sticking a pipe stub onto a pipe conduit at least up to the flush state of the of the flange section end-face and the nips conduit end-face, fixing the pipe conduit in the pipe stub in a press fit which is produced by the radial widening of the pipe conduit, and axially clamping the arisen pipe conduit units by way of clamping the flange sections of the pine stubs into the nine conduit arrangement. Also described is a pipe conduit arrangement.

A face seal fitting operable to join first and second conduits together and to provide a face seal, the face seal fitting comprising a body comprising a fluid passageway, and a coupling portion having an end defining a mating face; a gland comprising a fluid passageway, and an end having a mating face operable to be seated against the mating face of the body; a polyimide sealing component configured to be situated between the body and the gland; and a compression nut fittable over the gland and coupleable to the body, the compression nut being operable, upon torqueing to achieve a threshold compression load, to cause the mating face of the gland to seat against the mating face of the body, and to compress and elastically deform the polyimide sealing component to be flush with the mating faces of the body and the gland to form a face seal.

An O-ring seal system for pipe flanges having a backing ring, an O-ring seal positioned within the backing ring, and a vacuum ring positioned within the O-ring seal. The backing ring and the vacuum ring form a rigid base against which mating flanges on pipes can be bolted together, thereby preventing bending of the mating flanges and permitting flange bolts to be torqued to their full tensile load limit without damage to the mating flanges. The O-ring seal system is constructed so that the O-ring seal is retained between the mating flanges without the need to position the O-ring seal in a groove in one of the mating flanges. Bending of the flanges is minimized since the flanges are clamped against the backing ring, minimizing stresses due to bending, thereby extending the service life of the flanges.

A static sealing gasket of elastically deformable type, the gasket extending in elevation parallel to an axial direction perpendicular to a join plane, the gasket forming a closed loop around the axial direction and presenting a cross-section in each transverse half-plane of shape making it possible to ensure that the gasket is properly positioned inside a groove of a substantially complementary shape. Such a gasket comprises a body made of elastically deformable material, each cross-section of the gasket at rest being a polygon that is not regular and that is transversely asymmetrical.

A flange seal has a support body of a tough, hard material, and a sealing element of a rubbery-elastic material, that are interconnected in a single piece, the sealing element having a sealing edge that can be exposed to a medium to be sealed in a chamber to be sealed. In the state resulting from manufacture, the sealing element has cavities in the region of the sealing edge, which cavities vary in volume during use of the flange seal as intended.

A gasket includes a first face separated a predetermined distance from a second face, having a common though-hole. A metal frame is disposed between the first and the second faces, the metal frame supporting a first feature extending outwardly from opposing planar sides of the frame towards the first and the second faces, as well as supporting a second feature also extending outwardly from opposing planar sides of the frame towards the first and the second faces. The first feature is compressible when pressure is applied to the first and the second faces, and the second feature is incompressible when the pressure is applied to the first and the second faces. The first and the second features are continuous and concentrically aligned with one another about the through-hole, and the first feature is inclined towards the through-hole.

Gaskets for sealing two mating surfaces have an inner ring positioned between two inner sealing deformable layers and an outer ring positioned exterior and concentric to the inner ring, the outer ring positioned between two outer sealing deformable layers. The two inner sealing deformable layers are configured to compress a greater amount than the two outer sealing deformable layers when a compressive force is applied. In a compressed configuration, the two inner sealing deformable layers fill in the crevices of the mating surfaces of a corroded flange connection thereby avoiding immediate maintenance for the damaged flanges. The inner and outer rings have grooves and ridges on upper and lower surfaces to retain and receive portions of the inner and outer sealing deformable layers in a sealed flange connection.

Gaskets for sealing two mating surfaces have an inner ring positioned between two inner sealing deformable layers and an outer ring positioned exterior and concentric to the inner ring, the outer ring positioned between two outer sealing deformable layers. The two inner sealing deformable layers are configured to compress a greater amount than the two outer sealing deformable layers when a compressive force is applied. In a compressed configuration, the two inner sealing deformable layers fill in the crevices of the mating surfaces of a corroded flange connection thereby avoiding immediate maintenance for the damaged flanges. The inner and outer rings have grooves and ridges on upper and lower surfaces to retain and receive portions of the inner and outer sealing deformable layers in a sealed flange connection.